Convert your average ppm concentration (and standard deviation) of Ca from the ISE measurements below to molar concentration, assuming solution density of 1.000 g/mL. 69.3 mg/L 71.1 mg/L 72.7 mg/L
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Convert your average ppm concentration (and standard deviation) of Ca from the ISE measurements below to molar concentration, assuming solution density of 1.000 g/mL.
69.3 mg/L
71.1 mg/L
72.7 mg/L
Calculate average and standard deviation first and use it to calculate final answers.
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- Molarity trail 1 0.0366 trail 2 0.0373 trail 3 0.0370 Calculate the standard deviation. Calculate the Relative Standard deviation of molarity to 3 sig figs.Give the standard deviation of these three molaritys. 0.0366 0.0373 0.0370Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of bacteria. He obtained eight measurements of the percent iron in the protein: 0.4908%, 0.4902%, 0.4899%, 0.4899%, 0.5012%, 0.4891%, 0.4903%, and 0.4892%. Calculate the mean (x) and standard deviation (s) for these results. x = S= Use the Grubbs test to determine if one of these values is an outlier. What is the value of Gcalculated? Gcalculated = % %
- Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of bacteria. He obtained eight measurements of the percent iron in the protein: 0.5806%, 0.5804%, 0.5796%, 0.5794%, 0.5919%, 0.5795%, 0.5805%, and 0.5793%. Calculate the mean (x) and standard deviation (s) for these results. x = 0.5812 2.84 X10-3 Incorrect Use the Grubbs test to determine if of these values is an outlier. What is the value of Gcalculated? Gcalculated 0.494 Incorrect Should this potential outlier be rejected with 95% confidence? Critical values of G can be found in this table. O The potential outlier should be rejected. The potential outlier should be kept. % % ро en uti si luti4. A fat sample with combination of acids contain standard hydrochloric acid for blank and sample with 8mL and 5mL respectively. The normality of the standard hydrochloric acid is 0.93N and the weight of the sample is 3 grams. Calculate the saponification value.[References) A method for the determination of the corticosteroid methylprednisolone acetate in solutions obtained from pharmaceutical preparations yielded a mean value of 3.7 mg mL with a standard deviation of 0.3 mg mL. For quality control purposes, the relative uncertainty in the concentration should be no more than 3%. How many samples of each batch should be analyzed to ensure that the relative standard deviation does not exceed 9% at the 95% confidence level? samples
- A group of students titrate a calcium carbonate standard solution repeatedly in five experimental trials. Based on the five trials, the group determines that the average concentration of the standard is 80.5 ppm with a standard deviation of 0.5 ppm. Using the equation for the Student's t confidence interval found in Appendix 1 of your lab manual and the t-value for a 95% confidence interval, calculate the confidence interval for which there is a 95% chance of finding the "true value" of the standard solution's concentration based on the data. Put your answer in the format # lower limit < "true value" < # upper limit. (Appendix 2 has an example that may be helpful.)The solubility of an unknown liquid was measured 4 times. The average solubility is 0.05897 mL/mL and the standard deviation is 0.0027 mL/mL. How should those values be reported? O 0.058970.0027 O 0.0590±E0.0027 0.059±0.0027 O 0.058970.003Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of bacteria. He obtained eight measurements of the percent iron in the protein: 0.2409%, 0.2404%, 0.2394%, 0.2399%, 0.2515%, 0.2393%, 0.2409%, and 0.2392%. Calculate the mean (x) and standard deviation (s) for these results. % S = Use the Grubbs test to determine if one of these values is an outlier. What is the value of Galculated? Gcalculated = Should this potential outlier be rejected with 95% confidence? Critical values of G can be found in this table. The potential outlier should be rejected. The potential outlier should be kept.
- Concentration of Acetic Acid in a Vinegar Solution. Average molarity of NaOH Volume HC₂H30₂ sample Final buret reading Initial buret reading Volume NaOH (Show all units and all calculations) Molarity of HC₂H30₂ (unrounded) Average molarity of HC₂H302 (unrounded) Deviations Average deviation Best estimate for molarity of HC₂H302 Average mass percent HC₂H302 46.4mL Oml Ran out of Base ↓ ↓ ↓ ↓ 10.014 HOA je beart giov isults weari?! ferottelucuny Cambia) 10 Kousad Question 1. A Rolaids tablet contains calcium carbonate that neutralizes stomach acid. If 44.55 mL of 0.448 M hydrochloric acid is required to neutralize one tablet, how many milligrams of calcium carbonate are in a Rolaids tablet? CaCO, (s) + 2HCl(aq) → CaCl₂ (aq) + H₂O (1) + CO₂ (g)Table 2: Absorbance Values of Standards and Unknowns. Sample Blank Standard Solution 1 Standard Solution 2 Standard Solution 3 Standard Solution 4 Standard Solution 5 Water Sample 1 Water Sample 2 Phosphate Concentration (in ppm) Y17 0 ppm 0.02 ppm 0.04 ppm 0.08 ppm 0.16 ppm 0.32 ppm Freeman Lake 0.001 0.325 0.292 0.413 0.315 0.039 0.054 0.049 Absorbance at 2= 690 nm Calculations: 1. Construct a phosphate standard curve in Excel by plotting concentration (in ppm) on your x-axis and Absorbance (unitless) on your y-axis for your known solutions. Label the axes on the graph and provide the curve with a title. Use a linear trendline to generate a best fit line to your data. Label the graph with the equation and the R" value. Insert your labeled graph in the space below. XDr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of bacteria. He obtained eight measurements of the percent iron in the protein: 0.3205%, 0.3202%, 0.3196%, 0.3198%, 0.3316%, 0.3197%, 0.3208%, and 0.3197%. Calculate the mean () and standard deviation (s) for these results. x = Use the Grubbs test to determine if one of these values is an outlier. What is the value of Gealeulated? Gcalculated = Should this potential outlier be rejected with 95% confidence? Critical values of G can be found in this table. The potential outlier should be kept. The potential outlier should be rejected.